feat: add bgp observability and admin ui improvements

frontend/src/pages/Dashboard/Dashboard.tsx

@@ -10,6 +10,7 @@ import {
 } from '@ant-design/icons'
 import { useAuthStore } from '../../stores/auth'
 import AppLayout from '../../components/AppLayout/AppLayout'
+import { formatDateTimeZhCN } from '../../utils/datetime'
 
 const { Title, Text } = Typography
 
@@ -187,7 +188,7 @@ function Dashboard() {
 
         {stats?.last_updated && (
           <div style={{ textAlign: 'center', color: '#8c8c8c' }}>
-            最后更新: {new Date(stats.last_updated).toLocaleString('zh-CN')}
+            最后更新: {formatDateTimeZhCN(stats.last_updated)}
             {wsConnected && <Tag className="dashboard-status-tag" color="green" style={{ marginLeft: 8 }}>实时同步中</Tag>}
           </div>
         )}